| 1 | /* tc-mn10200.c -- Assembler code for the Matsushita 10200 |
| 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
| 3 | 2005 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 20 | Boston, MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include "as.h" |
| 24 | #include "safe-ctype.h" |
| 25 | #include "subsegs.h" |
| 26 | #include "opcode/mn10200.h" |
| 27 | \f |
| 28 | /* Structure to hold information about predefined registers. */ |
| 29 | struct reg_name |
| 30 | { |
| 31 | const char *name; |
| 32 | int value; |
| 33 | }; |
| 34 | |
| 35 | /* Generic assembler global variables which must be defined by all |
| 36 | targets. */ |
| 37 | |
| 38 | /* Characters which always start a comment. */ |
| 39 | const char comment_chars[] = "#"; |
| 40 | |
| 41 | /* Characters which start a comment at the beginning of a line. */ |
| 42 | const char line_comment_chars[] = ";#"; |
| 43 | |
| 44 | /* Characters which may be used to separate multiple commands on a |
| 45 | single line. */ |
| 46 | const char line_separator_chars[] = ";"; |
| 47 | |
| 48 | /* Characters which are used to indicate an exponent in a floating |
| 49 | point number. */ |
| 50 | const char EXP_CHARS[] = "eE"; |
| 51 | |
| 52 | /* Characters which mean that a number is a floating point constant, |
| 53 | as in 0d1.0. */ |
| 54 | const char FLT_CHARS[] = "dD"; |
| 55 | \f |
| 56 | const relax_typeS md_relax_table[] = |
| 57 | { |
| 58 | /* bCC relaxing */ |
| 59 | {0x81, -0x7e, 2, 1}, |
| 60 | {0x8004, -0x7ffb, 5, 2}, |
| 61 | {0x800006, -0x7ffff9, 7, 0}, |
| 62 | /* bCCx relaxing */ |
| 63 | {0x81, -0x7e, 3, 4}, |
| 64 | {0x8004, -0x7ffb, 6, 5}, |
| 65 | {0x800006, -0x7ffff9, 8, 0}, |
| 66 | /* jsr relaxing */ |
| 67 | {0x8004, -0x7ffb, 3, 7}, |
| 68 | {0x800006, -0x7ffff9, 5, 0}, |
| 69 | /* jmp relaxing */ |
| 70 | {0x81, -0x7e, 2, 9}, |
| 71 | {0x8004, -0x7ffb, 3, 10}, |
| 72 | {0x800006, -0x7ffff9, 5, 0}, |
| 73 | |
| 74 | }; |
| 75 | |
| 76 | |
| 77 | /* Fixups. */ |
| 78 | #define MAX_INSN_FIXUPS 5 |
| 79 | |
| 80 | struct mn10200_fixup |
| 81 | { |
| 82 | expressionS exp; |
| 83 | int opindex; |
| 84 | bfd_reloc_code_real_type reloc; |
| 85 | }; |
| 86 | |
| 87 | struct mn10200_fixup fixups[MAX_INSN_FIXUPS]; |
| 88 | static int fc; |
| 89 | \f |
| 90 | const char *md_shortopts = ""; |
| 91 | |
| 92 | struct option md_longopts[] = |
| 93 | { |
| 94 | {NULL, no_argument, NULL, 0} |
| 95 | }; |
| 96 | |
| 97 | size_t md_longopts_size = sizeof (md_longopts); |
| 98 | |
| 99 | /* The target specific pseudo-ops which we support. */ |
| 100 | const pseudo_typeS md_pseudo_table[] = |
| 101 | { |
| 102 | { NULL, NULL, 0 } |
| 103 | }; |
| 104 | |
| 105 | /* Opcode hash table. */ |
| 106 | static struct hash_control *mn10200_hash; |
| 107 | |
| 108 | /* This table is sorted. Suitable for searching by a binary search. */ |
| 109 | static const struct reg_name data_registers[] = |
| 110 | { |
| 111 | { "d0", 0 }, |
| 112 | { "d1", 1 }, |
| 113 | { "d2", 2 }, |
| 114 | { "d3", 3 }, |
| 115 | }; |
| 116 | #define DATA_REG_NAME_CNT \ |
| 117 | (sizeof (data_registers) / sizeof (struct reg_name)) |
| 118 | |
| 119 | static const struct reg_name address_registers[] = |
| 120 | { |
| 121 | { "a0", 0 }, |
| 122 | { "a1", 1 }, |
| 123 | { "a2", 2 }, |
| 124 | { "a3", 3 }, |
| 125 | }; |
| 126 | #define ADDRESS_REG_NAME_CNT \ |
| 127 | (sizeof (address_registers) / sizeof (struct reg_name)) |
| 128 | |
| 129 | static const struct reg_name other_registers[] = |
| 130 | { |
| 131 | { "mdr", 0 }, |
| 132 | { "psw", 0 }, |
| 133 | }; |
| 134 | #define OTHER_REG_NAME_CNT \ |
| 135 | (sizeof (other_registers) / sizeof (struct reg_name)) |
| 136 | |
| 137 | /* reg_name_search does a binary search of the given register table |
| 138 | to see if "name" is a valid regiter name. Returns the register |
| 139 | number from the array on success, or -1 on failure. */ |
| 140 | |
| 141 | static int |
| 142 | reg_name_search (const struct reg_name *regs, |
| 143 | int regcount, |
| 144 | const char *name) |
| 145 | { |
| 146 | int middle, low, high; |
| 147 | int cmp; |
| 148 | |
| 149 | low = 0; |
| 150 | high = regcount - 1; |
| 151 | |
| 152 | do |
| 153 | { |
| 154 | middle = (low + high) / 2; |
| 155 | cmp = strcasecmp (name, regs[middle].name); |
| 156 | if (cmp < 0) |
| 157 | high = middle - 1; |
| 158 | else if (cmp > 0) |
| 159 | low = middle + 1; |
| 160 | else |
| 161 | return regs[middle].value; |
| 162 | } |
| 163 | while (low <= high); |
| 164 | return -1; |
| 165 | } |
| 166 | |
| 167 | /* Summary of register_name(). |
| 168 | |
| 169 | in: Input_line_pointer points to 1st char of operand. |
| 170 | |
| 171 | out: An expressionS. |
| 172 | The operand may have been a register: in this case, X_op == O_register, |
| 173 | X_add_number is set to the register number, and truth is returned. |
| 174 | Input_line_pointer->(next non-blank) char after operand, or is in |
| 175 | its original state. */ |
| 176 | |
| 177 | static bfd_boolean |
| 178 | data_register_name (expressionS *expressionP) |
| 179 | { |
| 180 | int reg_number; |
| 181 | char *name; |
| 182 | char *start; |
| 183 | char c; |
| 184 | |
| 185 | /* Find the spelling of the operand. */ |
| 186 | start = name = input_line_pointer; |
| 187 | |
| 188 | c = get_symbol_end (); |
| 189 | reg_number = reg_name_search (data_registers, DATA_REG_NAME_CNT, name); |
| 190 | |
| 191 | /* Put back the delimiting char. */ |
| 192 | *input_line_pointer = c; |
| 193 | |
| 194 | /* Look to see if it's in the register table. */ |
| 195 | if (reg_number >= 0) |
| 196 | { |
| 197 | expressionP->X_op = O_register; |
| 198 | expressionP->X_add_number = reg_number; |
| 199 | |
| 200 | /* Make the rest nice. */ |
| 201 | expressionP->X_add_symbol = NULL; |
| 202 | expressionP->X_op_symbol = NULL; |
| 203 | |
| 204 | return TRUE; |
| 205 | } |
| 206 | |
| 207 | /* Reset the line as if we had not done anything. */ |
| 208 | input_line_pointer = start; |
| 209 | return FALSE; |
| 210 | } |
| 211 | |
| 212 | /* Summary of register_name(). |
| 213 | |
| 214 | in: Input_line_pointer points to 1st char of operand. |
| 215 | |
| 216 | out: An expressionS. |
| 217 | The operand may have been a register: in this case, X_op == O_register, |
| 218 | X_add_number is set to the register number, and truth is returned. |
| 219 | Input_line_pointer->(next non-blank) char after operand, or is in |
| 220 | its original state. */ |
| 221 | |
| 222 | static bfd_boolean |
| 223 | address_register_name (expressionS *expressionP) |
| 224 | { |
| 225 | int reg_number; |
| 226 | char *name; |
| 227 | char *start; |
| 228 | char c; |
| 229 | |
| 230 | /* Find the spelling of the operand. */ |
| 231 | start = name = input_line_pointer; |
| 232 | |
| 233 | c = get_symbol_end (); |
| 234 | reg_number = reg_name_search (address_registers, ADDRESS_REG_NAME_CNT, name); |
| 235 | |
| 236 | /* Put back the delimiting char. */ |
| 237 | *input_line_pointer = c; |
| 238 | |
| 239 | /* Look to see if it's in the register table. */ |
| 240 | if (reg_number >= 0) |
| 241 | { |
| 242 | expressionP->X_op = O_register; |
| 243 | expressionP->X_add_number = reg_number; |
| 244 | |
| 245 | /* Make the rest nice. */ |
| 246 | expressionP->X_add_symbol = NULL; |
| 247 | expressionP->X_op_symbol = NULL; |
| 248 | |
| 249 | return TRUE; |
| 250 | } |
| 251 | |
| 252 | /* Reset the line as if we had not done anything. */ |
| 253 | input_line_pointer = start; |
| 254 | return FALSE; |
| 255 | } |
| 256 | |
| 257 | /* Summary of register_name(). |
| 258 | |
| 259 | in: Input_line_pointer points to 1st char of operand. |
| 260 | |
| 261 | out: An expressionS. |
| 262 | The operand may have been a register: in this case, X_op == O_register, |
| 263 | X_add_number is set to the register number, and truth is returned. |
| 264 | Input_line_pointer->(next non-blank) char after operand, or is in |
| 265 | its original state. */ |
| 266 | |
| 267 | static bfd_boolean |
| 268 | other_register_name (expressionS *expressionP) |
| 269 | { |
| 270 | int reg_number; |
| 271 | char *name; |
| 272 | char *start; |
| 273 | char c; |
| 274 | |
| 275 | /* Find the spelling of the operand. */ |
| 276 | start = name = input_line_pointer; |
| 277 | |
| 278 | c = get_symbol_end (); |
| 279 | reg_number = reg_name_search (other_registers, OTHER_REG_NAME_CNT, name); |
| 280 | |
| 281 | /* Put back the delimiting char. */ |
| 282 | *input_line_pointer = c; |
| 283 | |
| 284 | /* Look to see if it's in the register table. */ |
| 285 | if (reg_number >= 0) |
| 286 | { |
| 287 | expressionP->X_op = O_register; |
| 288 | expressionP->X_add_number = reg_number; |
| 289 | |
| 290 | /* Make the rest nice. */ |
| 291 | expressionP->X_add_symbol = NULL; |
| 292 | expressionP->X_op_symbol = NULL; |
| 293 | |
| 294 | return TRUE; |
| 295 | } |
| 296 | |
| 297 | /* Reset the line as if we had not done anything. */ |
| 298 | input_line_pointer = start; |
| 299 | return FALSE; |
| 300 | } |
| 301 | |
| 302 | void |
| 303 | md_show_usage (FILE *stream) |
| 304 | { |
| 305 | fprintf (stream, _("MN10200 options:\n\ |
| 306 | none yet\n")); |
| 307 | } |
| 308 | |
| 309 | int |
| 310 | md_parse_option (int c ATTRIBUTE_UNUSED, |
| 311 | char *arg ATTRIBUTE_UNUSED) |
| 312 | { |
| 313 | return 0; |
| 314 | } |
| 315 | |
| 316 | symbolS * |
| 317 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 318 | { |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | char * |
| 323 | md_atof (int type, char *litp, int *sizep) |
| 324 | { |
| 325 | int prec; |
| 326 | LITTLENUM_TYPE words[4]; |
| 327 | char *t; |
| 328 | int i; |
| 329 | |
| 330 | switch (type) |
| 331 | { |
| 332 | case 'f': |
| 333 | prec = 2; |
| 334 | break; |
| 335 | |
| 336 | case 'd': |
| 337 | prec = 4; |
| 338 | break; |
| 339 | |
| 340 | default: |
| 341 | *sizep = 0; |
| 342 | return _("bad call to md_atof"); |
| 343 | } |
| 344 | |
| 345 | t = atof_ieee (input_line_pointer, type, words); |
| 346 | if (t) |
| 347 | input_line_pointer = t; |
| 348 | |
| 349 | *sizep = prec * 2; |
| 350 | |
| 351 | for (i = prec - 1; i >= 0; i--) |
| 352 | { |
| 353 | md_number_to_chars (litp, (valueT) words[i], 2); |
| 354 | litp += 2; |
| 355 | } |
| 356 | |
| 357 | return NULL; |
| 358 | } |
| 359 | |
| 360 | void |
| 361 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
| 362 | asection *sec, |
| 363 | fragS *fragP) |
| 364 | { |
| 365 | static unsigned long label_count = 0; |
| 366 | char buf[40]; |
| 367 | |
| 368 | subseg_change (sec, 0); |
| 369 | if (fragP->fr_subtype == 0) |
| 370 | { |
| 371 | fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol, |
| 372 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 373 | fragP->fr_var = 0; |
| 374 | fragP->fr_fix += 2; |
| 375 | } |
| 376 | else if (fragP->fr_subtype == 1) |
| 377 | { |
| 378 | /* Reverse the condition of the first branch. */ |
| 379 | int offset = fragP->fr_fix; |
| 380 | int opcode = fragP->fr_literal[offset] & 0xff; |
| 381 | |
| 382 | switch (opcode) |
| 383 | { |
| 384 | case 0xe8: |
| 385 | opcode = 0xe9; |
| 386 | break; |
| 387 | case 0xe9: |
| 388 | opcode = 0xe8; |
| 389 | break; |
| 390 | case 0xe0: |
| 391 | opcode = 0xe2; |
| 392 | break; |
| 393 | case 0xe2: |
| 394 | opcode = 0xe0; |
| 395 | break; |
| 396 | case 0xe3: |
| 397 | opcode = 0xe1; |
| 398 | break; |
| 399 | case 0xe1: |
| 400 | opcode = 0xe3; |
| 401 | break; |
| 402 | case 0xe4: |
| 403 | opcode = 0xe6; |
| 404 | break; |
| 405 | case 0xe6: |
| 406 | opcode = 0xe4; |
| 407 | break; |
| 408 | case 0xe7: |
| 409 | opcode = 0xe5; |
| 410 | break; |
| 411 | case 0xe5: |
| 412 | opcode = 0xe7; |
| 413 | break; |
| 414 | default: |
| 415 | abort (); |
| 416 | } |
| 417 | fragP->fr_literal[offset] = opcode; |
| 418 | |
| 419 | /* Create a fixup for the reversed conditional branch. */ |
| 420 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 421 | fix_new (fragP, fragP->fr_fix + 1, 1, |
| 422 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 423 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 424 | |
| 425 | /* Now create the unconditional branch + fixup to the |
| 426 | final target. */ |
| 427 | fragP->fr_literal[offset + 2] = 0xfc; |
| 428 | fix_new (fragP, fragP->fr_fix + 3, 2, fragP->fr_symbol, |
| 429 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 430 | fragP->fr_var = 0; |
| 431 | fragP->fr_fix += 5; |
| 432 | } |
| 433 | else if (fragP->fr_subtype == 2) |
| 434 | { |
| 435 | /* Reverse the condition of the first branch. */ |
| 436 | int offset = fragP->fr_fix; |
| 437 | int opcode = fragP->fr_literal[offset] & 0xff; |
| 438 | |
| 439 | switch (opcode) |
| 440 | { |
| 441 | case 0xe8: |
| 442 | opcode = 0xe9; |
| 443 | break; |
| 444 | case 0xe9: |
| 445 | opcode = 0xe8; |
| 446 | break; |
| 447 | case 0xe0: |
| 448 | opcode = 0xe2; |
| 449 | break; |
| 450 | case 0xe2: |
| 451 | opcode = 0xe0; |
| 452 | break; |
| 453 | case 0xe3: |
| 454 | opcode = 0xe1; |
| 455 | break; |
| 456 | case 0xe1: |
| 457 | opcode = 0xe3; |
| 458 | break; |
| 459 | case 0xe4: |
| 460 | opcode = 0xe6; |
| 461 | break; |
| 462 | case 0xe6: |
| 463 | opcode = 0xe4; |
| 464 | break; |
| 465 | case 0xe7: |
| 466 | opcode = 0xe5; |
| 467 | break; |
| 468 | case 0xe5: |
| 469 | opcode = 0xe7; |
| 470 | break; |
| 471 | default: |
| 472 | abort (); |
| 473 | } |
| 474 | fragP->fr_literal[offset] = opcode; |
| 475 | |
| 476 | /* Create a fixup for the reversed conditional branch. */ |
| 477 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 478 | fix_new (fragP, fragP->fr_fix + 1, 1, |
| 479 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 480 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 481 | |
| 482 | /* Now create the unconditional branch + fixup to the |
| 483 | final target. */ |
| 484 | fragP->fr_literal[offset + 2] = 0xf4; |
| 485 | fragP->fr_literal[offset + 3] = 0xe0; |
| 486 | fix_new (fragP, fragP->fr_fix + 4, 4, fragP->fr_symbol, |
| 487 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 488 | fragP->fr_var = 0; |
| 489 | fragP->fr_fix += 7; |
| 490 | } |
| 491 | else if (fragP->fr_subtype == 3) |
| 492 | { |
| 493 | fix_new (fragP, fragP->fr_fix + 2, 1, fragP->fr_symbol, |
| 494 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 495 | fragP->fr_var = 0; |
| 496 | fragP->fr_fix += 3; |
| 497 | } |
| 498 | else if (fragP->fr_subtype == 4) |
| 499 | { |
| 500 | /* Reverse the condition of the first branch. */ |
| 501 | int offset = fragP->fr_fix; |
| 502 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 503 | |
| 504 | switch (opcode) |
| 505 | { |
| 506 | case 0xfc: |
| 507 | opcode = 0xfd; |
| 508 | break; |
| 509 | case 0xfd: |
| 510 | opcode = 0xfc; |
| 511 | break; |
| 512 | case 0xfe: |
| 513 | opcode = 0xff; |
| 514 | break; |
| 515 | case 0xff: |
| 516 | opcode = 0xfe; |
| 517 | case 0xe8: |
| 518 | opcode = 0xe9; |
| 519 | break; |
| 520 | case 0xe9: |
| 521 | opcode = 0xe8; |
| 522 | break; |
| 523 | case 0xe0: |
| 524 | opcode = 0xe2; |
| 525 | break; |
| 526 | case 0xe2: |
| 527 | opcode = 0xe0; |
| 528 | break; |
| 529 | case 0xe3: |
| 530 | opcode = 0xe1; |
| 531 | break; |
| 532 | case 0xe1: |
| 533 | opcode = 0xe3; |
| 534 | break; |
| 535 | case 0xe4: |
| 536 | opcode = 0xe6; |
| 537 | break; |
| 538 | case 0xe6: |
| 539 | opcode = 0xe4; |
| 540 | break; |
| 541 | case 0xe7: |
| 542 | opcode = 0xe5; |
| 543 | break; |
| 544 | case 0xe5: |
| 545 | opcode = 0xe7; |
| 546 | break; |
| 547 | case 0xec: |
| 548 | opcode = 0xed; |
| 549 | break; |
| 550 | case 0xed: |
| 551 | opcode = 0xec; |
| 552 | break; |
| 553 | case 0xee: |
| 554 | opcode = 0xef; |
| 555 | break; |
| 556 | case 0xef: |
| 557 | opcode = 0xee; |
| 558 | break; |
| 559 | default: |
| 560 | abort (); |
| 561 | } |
| 562 | fragP->fr_literal[offset + 1] = opcode; |
| 563 | |
| 564 | /* Create a fixup for the reversed conditional branch. */ |
| 565 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 566 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 567 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 568 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 569 | |
| 570 | /* Now create the unconditional branch + fixup to the |
| 571 | final target. */ |
| 572 | fragP->fr_literal[offset + 3] = 0xfc; |
| 573 | fix_new (fragP, fragP->fr_fix + 4, 2, fragP->fr_symbol, |
| 574 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 575 | fragP->fr_var = 0; |
| 576 | fragP->fr_fix += 6; |
| 577 | } |
| 578 | else if (fragP->fr_subtype == 5) |
| 579 | { |
| 580 | /* Reverse the condition of the first branch. */ |
| 581 | int offset = fragP->fr_fix; |
| 582 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 583 | |
| 584 | switch (opcode) |
| 585 | { |
| 586 | case 0xfc: |
| 587 | opcode = 0xfd; |
| 588 | break; |
| 589 | case 0xfd: |
| 590 | opcode = 0xfc; |
| 591 | break; |
| 592 | case 0xfe: |
| 593 | opcode = 0xff; |
| 594 | break; |
| 595 | case 0xff: |
| 596 | opcode = 0xfe; |
| 597 | case 0xe8: |
| 598 | opcode = 0xe9; |
| 599 | break; |
| 600 | case 0xe9: |
| 601 | opcode = 0xe8; |
| 602 | break; |
| 603 | case 0xe0: |
| 604 | opcode = 0xe2; |
| 605 | break; |
| 606 | case 0xe2: |
| 607 | opcode = 0xe0; |
| 608 | break; |
| 609 | case 0xe3: |
| 610 | opcode = 0xe1; |
| 611 | break; |
| 612 | case 0xe1: |
| 613 | opcode = 0xe3; |
| 614 | break; |
| 615 | case 0xe4: |
| 616 | opcode = 0xe6; |
| 617 | break; |
| 618 | case 0xe6: |
| 619 | opcode = 0xe4; |
| 620 | break; |
| 621 | case 0xe7: |
| 622 | opcode = 0xe5; |
| 623 | break; |
| 624 | case 0xe5: |
| 625 | opcode = 0xe7; |
| 626 | break; |
| 627 | case 0xec: |
| 628 | opcode = 0xed; |
| 629 | break; |
| 630 | case 0xed: |
| 631 | opcode = 0xec; |
| 632 | break; |
| 633 | case 0xee: |
| 634 | opcode = 0xef; |
| 635 | break; |
| 636 | case 0xef: |
| 637 | opcode = 0xee; |
| 638 | break; |
| 639 | default: |
| 640 | abort (); |
| 641 | } |
| 642 | fragP->fr_literal[offset + 1] = opcode; |
| 643 | |
| 644 | /* Create a fixup for the reversed conditional branch. */ |
| 645 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 646 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 647 | symbol_new (buf, sec, 0, fragP->fr_next), |
| 648 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 649 | |
| 650 | /* Now create the unconditional branch + fixup to the |
| 651 | final target. */ |
| 652 | fragP->fr_literal[offset + 3] = 0xf4; |
| 653 | fragP->fr_literal[offset + 4] = 0xe0; |
| 654 | fix_new (fragP, fragP->fr_fix + 5, 4, fragP->fr_symbol, |
| 655 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 656 | fragP->fr_var = 0; |
| 657 | fragP->fr_fix += 8; |
| 658 | } |
| 659 | else if (fragP->fr_subtype == 6) |
| 660 | { |
| 661 | fix_new (fragP, fragP->fr_fix + 1, 2, fragP->fr_symbol, |
| 662 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 663 | fragP->fr_var = 0; |
| 664 | fragP->fr_fix += 3; |
| 665 | } |
| 666 | else if (fragP->fr_subtype == 7) |
| 667 | { |
| 668 | int offset = fragP->fr_fix; |
| 669 | fragP->fr_literal[offset] = 0xf4; |
| 670 | fragP->fr_literal[offset + 1] = 0xe1; |
| 671 | |
| 672 | fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol, |
| 673 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 674 | fragP->fr_var = 0; |
| 675 | fragP->fr_fix += 5; |
| 676 | } |
| 677 | else if (fragP->fr_subtype == 8) |
| 678 | { |
| 679 | fragP->fr_literal[fragP->fr_fix] = 0xea; |
| 680 | fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol, |
| 681 | fragP->fr_offset, 1, BFD_RELOC_8_PCREL); |
| 682 | fragP->fr_var = 0; |
| 683 | fragP->fr_fix += 2; |
| 684 | } |
| 685 | else if (fragP->fr_subtype == 9) |
| 686 | { |
| 687 | int offset = fragP->fr_fix; |
| 688 | fragP->fr_literal[offset] = 0xfc; |
| 689 | |
| 690 | fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol, |
| 691 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
| 692 | fragP->fr_var = 0; |
| 693 | fragP->fr_fix += 3; |
| 694 | } |
| 695 | else if (fragP->fr_subtype == 10) |
| 696 | { |
| 697 | int offset = fragP->fr_fix; |
| 698 | fragP->fr_literal[offset] = 0xf4; |
| 699 | fragP->fr_literal[offset + 1] = 0xe0; |
| 700 | |
| 701 | fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol, |
| 702 | fragP->fr_offset, 1, BFD_RELOC_24_PCREL); |
| 703 | fragP->fr_var = 0; |
| 704 | fragP->fr_fix += 5; |
| 705 | } |
| 706 | else |
| 707 | abort (); |
| 708 | } |
| 709 | |
| 710 | valueT |
| 711 | md_section_align (asection *seg, valueT addr) |
| 712 | { |
| 713 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 714 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 715 | } |
| 716 | |
| 717 | void |
| 718 | md_begin (void) |
| 719 | { |
| 720 | char *prev_name = ""; |
| 721 | register const struct mn10200_opcode *op; |
| 722 | |
| 723 | mn10200_hash = hash_new (); |
| 724 | |
| 725 | /* Insert unique names into hash table. The MN10200 instruction set |
| 726 | has many identical opcode names that have different opcodes based |
| 727 | on the operands. This hash table then provides a quick index to |
| 728 | the first opcode with a particular name in the opcode table. */ |
| 729 | |
| 730 | op = mn10200_opcodes; |
| 731 | while (op->name) |
| 732 | { |
| 733 | if (strcmp (prev_name, op->name)) |
| 734 | { |
| 735 | prev_name = (char *) op->name; |
| 736 | hash_insert (mn10200_hash, op->name, (char *) op); |
| 737 | } |
| 738 | op++; |
| 739 | } |
| 740 | |
| 741 | /* This is both a simplification (we don't have to write md_apply_fix3) |
| 742 | and support for future optimizations (branch shortening and similar |
| 743 | stuff in the linker. */ |
| 744 | linkrelax = 1; |
| 745 | } |
| 746 | |
| 747 | static unsigned long |
| 748 | check_operand (unsigned long insn ATTRIBUTE_UNUSED, |
| 749 | const struct mn10200_operand *operand, |
| 750 | offsetT val) |
| 751 | { |
| 752 | /* No need to check 24bit or 32bit operands for a bit. */ |
| 753 | if (operand->bits < 24 |
| 754 | && (operand->flags & MN10200_OPERAND_NOCHECK) == 0) |
| 755 | { |
| 756 | long min, max; |
| 757 | offsetT test; |
| 758 | |
| 759 | if ((operand->flags & MN10200_OPERAND_SIGNED) != 0) |
| 760 | { |
| 761 | max = (1 << (operand->bits - 1)) - 1; |
| 762 | min = - (1 << (operand->bits - 1)); |
| 763 | } |
| 764 | else |
| 765 | { |
| 766 | max = (1 << operand->bits) - 1; |
| 767 | min = 0; |
| 768 | } |
| 769 | |
| 770 | test = val; |
| 771 | |
| 772 | if (test < (offsetT) min || test > (offsetT) max) |
| 773 | return 0; |
| 774 | else |
| 775 | return 1; |
| 776 | } |
| 777 | return 1; |
| 778 | } |
| 779 | /* If while processing a fixup, a reloc really needs to be created |
| 780 | Then it is done here. */ |
| 781 | |
| 782 | arelent * |
| 783 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp) |
| 784 | { |
| 785 | arelent *reloc; |
| 786 | reloc = xmalloc (sizeof (arelent)); |
| 787 | |
| 788 | if (fixp->fx_subsy != NULL) |
| 789 | { |
| 790 | if (S_GET_SEGMENT (fixp->fx_addsy) == S_GET_SEGMENT (fixp->fx_subsy) |
| 791 | && S_IS_DEFINED (fixp->fx_subsy)) |
| 792 | { |
| 793 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); |
| 794 | fixp->fx_subsy = NULL; |
| 795 | } |
| 796 | else |
| 797 | /* FIXME: We should try more ways to resolve difference expressions |
| 798 | here. At least this is better than silently ignoring the |
| 799 | subtrahend. */ |
| 800 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 801 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), |
| 802 | fixp->fx_addsy ? S_GET_NAME (fixp->fx_addsy) : "0", |
| 803 | segment_name (fixp->fx_addsy |
| 804 | ? S_GET_SEGMENT (fixp->fx_addsy) |
| 805 | : absolute_section), |
| 806 | S_GET_NAME (fixp->fx_subsy), |
| 807 | segment_name (S_GET_SEGMENT (fixp->fx_addsy))); |
| 808 | } |
| 809 | |
| 810 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 811 | if (reloc->howto == NULL) |
| 812 | { |
| 813 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 814 | _("reloc %d not supported by object file format"), |
| 815 | (int) fixp->fx_r_type); |
| 816 | return NULL; |
| 817 | } |
| 818 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 819 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
| 820 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 821 | reloc->addend = fixp->fx_offset; |
| 822 | return reloc; |
| 823 | } |
| 824 | |
| 825 | int |
| 826 | md_estimate_size_before_relax (fragS *fragp, asection *seg) |
| 827 | { |
| 828 | if (fragp->fr_subtype == 6 |
| 829 | && (!S_IS_DEFINED (fragp->fr_symbol) |
| 830 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) |
| 831 | fragp->fr_subtype = 7; |
| 832 | else if (fragp->fr_subtype == 8 |
| 833 | && (!S_IS_DEFINED (fragp->fr_symbol) |
| 834 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) |
| 835 | fragp->fr_subtype = 10; |
| 836 | |
| 837 | if (fragp->fr_subtype >= sizeof (md_relax_table) / sizeof (md_relax_table[0])) |
| 838 | abort (); |
| 839 | |
| 840 | return md_relax_table[fragp->fr_subtype].rlx_length; |
| 841 | } |
| 842 | |
| 843 | long |
| 844 | md_pcrel_from (fixS *fixp) |
| 845 | { |
| 846 | return fixp->fx_frag->fr_address; |
| 847 | } |
| 848 | |
| 849 | void |
| 850 | md_apply_fix3 (fixS * fixP, valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED) |
| 851 | { |
| 852 | /* We shouldn't ever get here because linkrelax is nonzero. */ |
| 853 | abort (); |
| 854 | fixP->fx_done = 1; |
| 855 | } |
| 856 | |
| 857 | /* Insert an operand value into an instruction. */ |
| 858 | |
| 859 | static void |
| 860 | mn10200_insert_operand (unsigned long *insnp, |
| 861 | unsigned long *extensionp, |
| 862 | const struct mn10200_operand *operand, |
| 863 | offsetT val, |
| 864 | char *file, |
| 865 | unsigned int line, |
| 866 | unsigned int shift) |
| 867 | { |
| 868 | /* No need to check 24 or 32bit operands for a bit. */ |
| 869 | if (operand->bits < 24 |
| 870 | && (operand->flags & MN10200_OPERAND_NOCHECK) == 0) |
| 871 | { |
| 872 | long min, max; |
| 873 | offsetT test; |
| 874 | |
| 875 | if ((operand->flags & MN10200_OPERAND_SIGNED) != 0) |
| 876 | { |
| 877 | max = (1 << (operand->bits - 1)) - 1; |
| 878 | min = - (1 << (operand->bits - 1)); |
| 879 | } |
| 880 | else |
| 881 | { |
| 882 | max = (1 << operand->bits) - 1; |
| 883 | min = 0; |
| 884 | } |
| 885 | |
| 886 | test = val; |
| 887 | |
| 888 | if (test < (offsetT) min || test > (offsetT) max) |
| 889 | as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line); |
| 890 | } |
| 891 | |
| 892 | if ((operand->flags & MN10200_OPERAND_EXTENDED) == 0) |
| 893 | { |
| 894 | *insnp |= (((long) val & ((1 << operand->bits) - 1)) |
| 895 | << (operand->shift + shift)); |
| 896 | |
| 897 | if ((operand->flags & MN10200_OPERAND_REPEATED) != 0) |
| 898 | *insnp |= (((long) val & ((1 << operand->bits) - 1)) |
| 899 | << (operand->shift + shift + 2)); |
| 900 | } |
| 901 | else |
| 902 | { |
| 903 | *extensionp |= (val >> 16) & 0xff; |
| 904 | *insnp |= val & 0xffff; |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | void |
| 909 | md_assemble (char *str) |
| 910 | { |
| 911 | char *s; |
| 912 | struct mn10200_opcode *opcode; |
| 913 | struct mn10200_opcode *next_opcode; |
| 914 | const unsigned char *opindex_ptr; |
| 915 | int next_opindex, relaxable; |
| 916 | unsigned long insn, extension, size = 0; |
| 917 | char *f; |
| 918 | int i; |
| 919 | int match; |
| 920 | |
| 921 | /* Get the opcode. */ |
| 922 | for (s = str; *s != '\0' && !ISSPACE (*s); s++) |
| 923 | ; |
| 924 | if (*s != '\0') |
| 925 | *s++ = '\0'; |
| 926 | |
| 927 | /* Find the first opcode with the proper name. */ |
| 928 | opcode = (struct mn10200_opcode *) hash_find (mn10200_hash, str); |
| 929 | if (opcode == NULL) |
| 930 | { |
| 931 | as_bad (_("Unrecognized opcode: `%s'"), str); |
| 932 | return; |
| 933 | } |
| 934 | |
| 935 | str = s; |
| 936 | while (ISSPACE (*str)) |
| 937 | ++str; |
| 938 | |
| 939 | input_line_pointer = str; |
| 940 | |
| 941 | for (;;) |
| 942 | { |
| 943 | const char *errmsg = NULL; |
| 944 | int op_idx; |
| 945 | char *hold; |
| 946 | int extra_shift = 0; |
| 947 | |
| 948 | relaxable = 0; |
| 949 | fc = 0; |
| 950 | match = 0; |
| 951 | next_opindex = 0; |
| 952 | insn = opcode->opcode; |
| 953 | extension = 0; |
| 954 | for (op_idx = 1, opindex_ptr = opcode->operands; |
| 955 | *opindex_ptr != 0; |
| 956 | opindex_ptr++, op_idx++) |
| 957 | { |
| 958 | const struct mn10200_operand *operand; |
| 959 | expressionS ex; |
| 960 | |
| 961 | if (next_opindex == 0) |
| 962 | { |
| 963 | operand = &mn10200_operands[*opindex_ptr]; |
| 964 | } |
| 965 | else |
| 966 | { |
| 967 | operand = &mn10200_operands[next_opindex]; |
| 968 | next_opindex = 0; |
| 969 | } |
| 970 | |
| 971 | errmsg = NULL; |
| 972 | |
| 973 | while (*str == ' ' || *str == ',') |
| 974 | ++str; |
| 975 | |
| 976 | if (operand->flags & MN10200_OPERAND_RELAX) |
| 977 | relaxable = 1; |
| 978 | |
| 979 | /* Gather the operand. */ |
| 980 | hold = input_line_pointer; |
| 981 | input_line_pointer = str; |
| 982 | |
| 983 | if (operand->flags & MN10200_OPERAND_PAREN) |
| 984 | { |
| 985 | if (*input_line_pointer != ')' && *input_line_pointer != '(') |
| 986 | { |
| 987 | input_line_pointer = hold; |
| 988 | str = hold; |
| 989 | goto error; |
| 990 | } |
| 991 | input_line_pointer++; |
| 992 | goto keep_going; |
| 993 | } |
| 994 | /* See if we can match the operands. */ |
| 995 | else if (operand->flags & MN10200_OPERAND_DREG) |
| 996 | { |
| 997 | if (!data_register_name (&ex)) |
| 998 | { |
| 999 | input_line_pointer = hold; |
| 1000 | str = hold; |
| 1001 | goto error; |
| 1002 | } |
| 1003 | } |
| 1004 | else if (operand->flags & MN10200_OPERAND_AREG) |
| 1005 | { |
| 1006 | if (!address_register_name (&ex)) |
| 1007 | { |
| 1008 | input_line_pointer = hold; |
| 1009 | str = hold; |
| 1010 | goto error; |
| 1011 | } |
| 1012 | } |
| 1013 | else if (operand->flags & MN10200_OPERAND_PSW) |
| 1014 | { |
| 1015 | char *start = input_line_pointer; |
| 1016 | char c = get_symbol_end (); |
| 1017 | |
| 1018 | if (strcmp (start, "psw") != 0) |
| 1019 | { |
| 1020 | *input_line_pointer = c; |
| 1021 | input_line_pointer = hold; |
| 1022 | str = hold; |
| 1023 | goto error; |
| 1024 | } |
| 1025 | *input_line_pointer = c; |
| 1026 | goto keep_going; |
| 1027 | } |
| 1028 | else if (operand->flags & MN10200_OPERAND_MDR) |
| 1029 | { |
| 1030 | char *start = input_line_pointer; |
| 1031 | char c = get_symbol_end (); |
| 1032 | |
| 1033 | if (strcmp (start, "mdr") != 0) |
| 1034 | { |
| 1035 | *input_line_pointer = c; |
| 1036 | input_line_pointer = hold; |
| 1037 | str = hold; |
| 1038 | goto error; |
| 1039 | } |
| 1040 | *input_line_pointer = c; |
| 1041 | goto keep_going; |
| 1042 | } |
| 1043 | else if (data_register_name (&ex)) |
| 1044 | { |
| 1045 | input_line_pointer = hold; |
| 1046 | str = hold; |
| 1047 | goto error; |
| 1048 | } |
| 1049 | else if (address_register_name (&ex)) |
| 1050 | { |
| 1051 | input_line_pointer = hold; |
| 1052 | str = hold; |
| 1053 | goto error; |
| 1054 | } |
| 1055 | else if (other_register_name (&ex)) |
| 1056 | { |
| 1057 | input_line_pointer = hold; |
| 1058 | str = hold; |
| 1059 | goto error; |
| 1060 | } |
| 1061 | else if (*str == ')' || *str == '(') |
| 1062 | { |
| 1063 | input_line_pointer = hold; |
| 1064 | str = hold; |
| 1065 | goto error; |
| 1066 | } |
| 1067 | else |
| 1068 | { |
| 1069 | expression (&ex); |
| 1070 | } |
| 1071 | |
| 1072 | switch (ex.X_op) |
| 1073 | { |
| 1074 | case O_illegal: |
| 1075 | errmsg = _("illegal operand"); |
| 1076 | goto error; |
| 1077 | case O_absent: |
| 1078 | errmsg = _("missing operand"); |
| 1079 | goto error; |
| 1080 | case O_register: |
| 1081 | if ((operand->flags |
| 1082 | & (MN10200_OPERAND_DREG | MN10200_OPERAND_AREG)) == 0) |
| 1083 | { |
| 1084 | input_line_pointer = hold; |
| 1085 | str = hold; |
| 1086 | goto error; |
| 1087 | } |
| 1088 | |
| 1089 | if (opcode->format == FMT_2 || opcode->format == FMT_5) |
| 1090 | extra_shift = 8; |
| 1091 | else if (opcode->format == FMT_3 || opcode->format == FMT_6 |
| 1092 | || opcode->format == FMT_7) |
| 1093 | extra_shift = 16; |
| 1094 | else |
| 1095 | extra_shift = 0; |
| 1096 | |
| 1097 | mn10200_insert_operand (&insn, &extension, operand, |
| 1098 | ex.X_add_number, NULL, |
| 1099 | 0, extra_shift); |
| 1100 | |
| 1101 | break; |
| 1102 | |
| 1103 | case O_constant: |
| 1104 | /* If this operand can be promoted, and it doesn't |
| 1105 | fit into the allocated bitfield for this insn, |
| 1106 | then promote it (ie this opcode does not match). */ |
| 1107 | if (operand->flags |
| 1108 | & (MN10200_OPERAND_PROMOTE | MN10200_OPERAND_RELAX) |
| 1109 | && !check_operand (insn, operand, ex.X_add_number)) |
| 1110 | { |
| 1111 | input_line_pointer = hold; |
| 1112 | str = hold; |
| 1113 | goto error; |
| 1114 | } |
| 1115 | |
| 1116 | mn10200_insert_operand (&insn, &extension, operand, |
| 1117 | ex.X_add_number, NULL, |
| 1118 | 0, 0); |
| 1119 | break; |
| 1120 | |
| 1121 | default: |
| 1122 | /* If this operand can be promoted, then this opcode didn't |
| 1123 | match since we can't know if it needed promotion! */ |
| 1124 | if (operand->flags & MN10200_OPERAND_PROMOTE) |
| 1125 | { |
| 1126 | input_line_pointer = hold; |
| 1127 | str = hold; |
| 1128 | goto error; |
| 1129 | } |
| 1130 | |
| 1131 | /* We need to generate a fixup for this expression. */ |
| 1132 | if (fc >= MAX_INSN_FIXUPS) |
| 1133 | as_fatal (_("too many fixups")); |
| 1134 | fixups[fc].exp = ex; |
| 1135 | fixups[fc].opindex = *opindex_ptr; |
| 1136 | fixups[fc].reloc = BFD_RELOC_UNUSED; |
| 1137 | ++fc; |
| 1138 | break; |
| 1139 | } |
| 1140 | |
| 1141 | keep_going: |
| 1142 | str = input_line_pointer; |
| 1143 | input_line_pointer = hold; |
| 1144 | |
| 1145 | while (*str == ' ' || *str == ',') |
| 1146 | ++str; |
| 1147 | |
| 1148 | } |
| 1149 | |
| 1150 | /* Make sure we used all the operands! */ |
| 1151 | if (*str != ',') |
| 1152 | match = 1; |
| 1153 | |
| 1154 | error: |
| 1155 | if (match == 0) |
| 1156 | { |
| 1157 | next_opcode = opcode + 1; |
| 1158 | if (!strcmp (next_opcode->name, opcode->name)) |
| 1159 | { |
| 1160 | opcode = next_opcode; |
| 1161 | continue; |
| 1162 | } |
| 1163 | |
| 1164 | as_bad ("%s", errmsg); |
| 1165 | return; |
| 1166 | } |
| 1167 | break; |
| 1168 | } |
| 1169 | |
| 1170 | while (ISSPACE (*str)) |
| 1171 | ++str; |
| 1172 | |
| 1173 | if (*str != '\0') |
| 1174 | as_bad (_("junk at end of line: `%s'"), str); |
| 1175 | |
| 1176 | input_line_pointer = str; |
| 1177 | |
| 1178 | if (opcode->format == FMT_1) |
| 1179 | size = 1; |
| 1180 | else if (opcode->format == FMT_2 || opcode->format == FMT_4) |
| 1181 | size = 2; |
| 1182 | else if (opcode->format == FMT_3 || opcode->format == FMT_5) |
| 1183 | size = 3; |
| 1184 | else if (opcode->format == FMT_6) |
| 1185 | size = 4; |
| 1186 | else if (opcode->format == FMT_7) |
| 1187 | size = 5; |
| 1188 | else |
| 1189 | abort (); |
| 1190 | |
| 1191 | /* Write out the instruction. */ |
| 1192 | if (relaxable && fc > 0) |
| 1193 | { |
| 1194 | int type; |
| 1195 | |
| 1196 | /* bCC */ |
| 1197 | if (size == 2 && opcode->opcode != 0xfc0000) |
| 1198 | { |
| 1199 | /* Handle bra specially. Basically treat it like jmp so |
| 1200 | that we automatically handle 8, 16 and 32 bit offsets |
| 1201 | correctly as well as jumps to an undefined address. |
| 1202 | |
| 1203 | It is also important to not treat it like other bCC |
| 1204 | instructions since the long forms of bra is different |
| 1205 | from other bCC instructions. */ |
| 1206 | if (opcode->opcode == 0xea00) |
| 1207 | type = 8; |
| 1208 | else |
| 1209 | type = 0; |
| 1210 | } |
| 1211 | /* jsr */ |
| 1212 | else if (size == 3 && opcode->opcode == 0xfd0000) |
| 1213 | type = 6; |
| 1214 | /* jmp */ |
| 1215 | else if (size == 3 && opcode->opcode == 0xfc0000) |
| 1216 | type = 8; |
| 1217 | /* bCCx */ |
| 1218 | else |
| 1219 | type = 3; |
| 1220 | |
| 1221 | f = frag_var (rs_machine_dependent, 8, 8 - size, type, |
| 1222 | fixups[0].exp.X_add_symbol, |
| 1223 | fixups[0].exp.X_add_number, |
| 1224 | (char *)fixups[0].opindex); |
| 1225 | number_to_chars_bigendian (f, insn, size); |
| 1226 | if (8 - size > 4) |
| 1227 | { |
| 1228 | number_to_chars_bigendian (f + size, 0, 4); |
| 1229 | number_to_chars_bigendian (f + size + 4, 0, 8 - size - 4); |
| 1230 | } |
| 1231 | else |
| 1232 | number_to_chars_bigendian (f + size, 0, 8 - size); |
| 1233 | } |
| 1234 | else |
| 1235 | { |
| 1236 | f = frag_more (size); |
| 1237 | |
| 1238 | /* Oh, what a mess. The instruction is in big endian format, but |
| 1239 | 16 and 24bit immediates are little endian! */ |
| 1240 | if (opcode->format == FMT_3) |
| 1241 | { |
| 1242 | number_to_chars_bigendian (f, (insn >> 16) & 0xff, 1); |
| 1243 | number_to_chars_littleendian (f + 1, insn & 0xffff, 2); |
| 1244 | } |
| 1245 | else if (opcode->format == FMT_6) |
| 1246 | { |
| 1247 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 1248 | number_to_chars_littleendian (f + 2, insn & 0xffff, 2); |
| 1249 | } |
| 1250 | else if (opcode->format == FMT_7) |
| 1251 | { |
| 1252 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 1253 | number_to_chars_littleendian (f + 2, insn & 0xffff, 2); |
| 1254 | number_to_chars_littleendian (f + 4, extension & 0xff, 1); |
| 1255 | } |
| 1256 | else |
| 1257 | number_to_chars_bigendian (f, insn, size > 4 ? 4 : size); |
| 1258 | |
| 1259 | /* Create any fixups. */ |
| 1260 | for (i = 0; i < fc; i++) |
| 1261 | { |
| 1262 | const struct mn10200_operand *operand; |
| 1263 | |
| 1264 | operand = &mn10200_operands[fixups[i].opindex]; |
| 1265 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
| 1266 | { |
| 1267 | reloc_howto_type *reloc_howto; |
| 1268 | int size; |
| 1269 | int offset; |
| 1270 | fixS *fixP; |
| 1271 | |
| 1272 | reloc_howto = bfd_reloc_type_lookup (stdoutput, |
| 1273 | fixups[i].reloc); |
| 1274 | |
| 1275 | if (!reloc_howto) |
| 1276 | abort (); |
| 1277 | |
| 1278 | size = bfd_get_reloc_size (reloc_howto); |
| 1279 | |
| 1280 | if (size < 1 || size > 4) |
| 1281 | abort (); |
| 1282 | |
| 1283 | offset = 4 - size; |
| 1284 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, |
| 1285 | size, |
| 1286 | &fixups[i].exp, |
| 1287 | reloc_howto->pc_relative, |
| 1288 | fixups[i].reloc); |
| 1289 | |
| 1290 | /* PC-relative offsets are from the first byte of the |
| 1291 | next instruction, not from the start of the current |
| 1292 | instruction. */ |
| 1293 | if (reloc_howto->pc_relative) |
| 1294 | fixP->fx_offset += size; |
| 1295 | } |
| 1296 | else |
| 1297 | { |
| 1298 | int reloc, pcrel, reloc_size, offset; |
| 1299 | fixS *fixP; |
| 1300 | |
| 1301 | reloc = BFD_RELOC_NONE; |
| 1302 | /* How big is the reloc? Remember SPLIT relocs are |
| 1303 | implicitly 32bits. */ |
| 1304 | reloc_size = operand->bits; |
| 1305 | |
| 1306 | offset = size - reloc_size / 8; |
| 1307 | |
| 1308 | /* Is the reloc pc-relative? */ |
| 1309 | pcrel = (operand->flags & MN10200_OPERAND_PCREL) != 0; |
| 1310 | |
| 1311 | /* Choose a proper BFD relocation type. */ |
| 1312 | if (pcrel) |
| 1313 | { |
| 1314 | if (reloc_size == 8) |
| 1315 | reloc = BFD_RELOC_8_PCREL; |
| 1316 | else if (reloc_size == 24) |
| 1317 | reloc = BFD_RELOC_24_PCREL; |
| 1318 | else |
| 1319 | abort (); |
| 1320 | } |
| 1321 | else |
| 1322 | { |
| 1323 | if (reloc_size == 32) |
| 1324 | reloc = BFD_RELOC_32; |
| 1325 | else if (reloc_size == 16) |
| 1326 | reloc = BFD_RELOC_16; |
| 1327 | else if (reloc_size == 8) |
| 1328 | reloc = BFD_RELOC_8; |
| 1329 | else if (reloc_size == 24) |
| 1330 | reloc = BFD_RELOC_24; |
| 1331 | else |
| 1332 | abort (); |
| 1333 | } |
| 1334 | |
| 1335 | /* Convert the size of the reloc into what fix_new_exp |
| 1336 | wants. */ |
| 1337 | reloc_size = reloc_size / 8; |
| 1338 | if (reloc_size == 8) |
| 1339 | reloc_size = 0; |
| 1340 | else if (reloc_size == 16) |
| 1341 | reloc_size = 1; |
| 1342 | else if (reloc_size == 32 || reloc_size == 24) |
| 1343 | reloc_size = 2; |
| 1344 | |
| 1345 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, |
| 1346 | reloc_size, &fixups[i].exp, pcrel, |
| 1347 | ((bfd_reloc_code_real_type) reloc)); |
| 1348 | |
| 1349 | /* PC-relative offsets are from the first byte of the |
| 1350 | next instruction, not from the start of the current |
| 1351 | instruction. */ |
| 1352 | if (pcrel) |
| 1353 | fixP->fx_offset += size; |
| 1354 | } |
| 1355 | } |
| 1356 | } |
| 1357 | } |
| 1358 | |